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[AhmadMMoktar]

Hello everyone,

HYSYS has in its column specs different ways to calculate the cut points (i. e. D86 5%, 95%,....), examples of these methods are:

1. column cut point spec.
2. End point based column cut points (that's for refsys).
3. column stream property .. then D86 ...%.

each one of these methods gives a different value from the others.

My question: does anyone know the different correlation used for each method, and what's the more accurate one as they give different results?